// Component coverage for the Phase 30 ship-class calculator: forward
// results, single-target goal-seek wired through a mounted component, the
// Create flow against a real OrderDraftStore, and the planet area. The
// math itself is covered by `calc-model.test.ts` and the Go parity tests;
// here we assert the component renders and orchestrates them.

import "@testing-library/jest-dom/vitest";
import "fake-indexeddb/auto";
import { fireEvent, render } from "@testing-library/svelte";
import { afterEach, beforeEach, describe, expect, test, vi } from "vitest";

// The calculator reads `page.params.id` to scope its long-lived state to
// the active game; stub a stable id so the component test has a router.
vi.mock("$app/state", () => ({ page: { params: { id: "calc-test-game" } } }));

import { i18n } from "../src/lib/i18n/index.svelte";
import CalculatorTab from "../src/lib/sidebar/calculator-tab.svelte";
import { calculatorState } from "../src/lib/calculator/calc-state.svelte";
import { CORE_CONTEXT_KEY, CoreHolder } from "../src/lib/core-context.svelte";
import {
	ORDER_DRAFT_CONTEXT_KEY,
	OrderDraftStore,
} from "../src/sync/order-draft.svelte";
import {
	SELECTION_CONTEXT_KEY,
	SelectionStore,
} from "../src/lib/selection.svelte";
import {
	RENDERED_REPORT_CONTEXT_KEY,
	type RenderedReportSource,
} from "../src/lib/rendered-report.svelte";
import type { GameReport, ReportPlanet } from "../src/api/game-state";
import type { Core } from "../src/platform/core/index";
import { makeFakeCore } from "./fake-core";
import { IDBCache } from "../src/platform/store/idb-cache";
import { openGalaxyDB, type GalaxyDB } from "../src/platform/store/idb";
import type { IDBPDatabase } from "idb";

const GAME_ID = "11111111-2222-3333-4444-555555555555";

let db: IDBPDatabase<GalaxyDB>;
let dbName: string;
let draft: OrderDraftStore;

const LOCAL_PLANET: ReportPlanet = {
	number: 17,
	name: "Castle",
	x: 100,
	y: 100,
	kind: "local",
	owner: "me",
	size: 1000,
	resources: 10,
	industryStockpile: 0,
	materialsStockpile: 100,
	industry: 1000,
	population: 1000,
	colonists: 0,
	production: "Cruiser",
	freeIndustry: 1000,
};

function makeReport(over: Partial<GameReport> = {}): GameReport {
	return {
		localPlayerDrive: 1.2,
		localPlayerWeapons: 1.5,
		localPlayerShields: 1,
		localPlayerCargo: 1,
		localShipClass: [],
		planets: [],
		...over,
	} as unknown as GameReport;
}

function mount(opts: {
	core?: Core | null;
	report?: GameReport;
	selection?: SelectionStore;
} = {}) {
	const holder = new CoreHolder();
	holder.set(opts.core === undefined ? makeFakeCore() : opts.core);
	const selection = opts.selection ?? new SelectionStore();
	const report = opts.report ?? makeReport();
	const source: RenderedReportSource = {
		get report() {
			return report;
		},
	};
	const context = new Map<unknown, unknown>([
		[RENDERED_REPORT_CONTEXT_KEY, source],
		[ORDER_DRAFT_CONTEXT_KEY, draft],
		[CORE_CONTEXT_KEY, holder],
		[SELECTION_CONTEXT_KEY, selection],
	]);
	return render(CalculatorTab, { context });
}

async function setBlock(
	ui: { getByTestId(id: string): HTMLElement },
	key: string,
	value: number,
): Promise<void> {
	await fireEvent.input(ui.getByTestId(`calculator-block-${key}`), {
		target: { value: String(value) },
	});
}

beforeEach(async () => {
	dbName = `galaxy-calculator-${crypto.randomUUID()}`;
	db = await openGalaxyDB(dbName);
	draft = new OrderDraftStore();
	await draft.init({ cache: new IDBCache(db), gameId: GAME_ID });
	i18n.resetForTests("en");
	// The calculator state is a module singleton shared across cases.
	calculatorState.reset();
});

afterEach(async () => {
	draft.dispose();
	db.close();
	await new Promise<void>((resolve) => {
		const req = indexedDB.deleteDatabase(dbName);
		req.onsuccess = () => resolve();
		req.onerror = () => resolve();
		req.onblocked = () => resolve();
	});
});

describe("calculator-tab", () => {
	test("computes results once the blocks are valid", async () => {
		const ui = mount();
		// All-zero blocks are invalid: results read as unavailable.
		expect(ui.getByTestId("calculator-out-emptyMass")).toHaveTextContent("—");
		await setBlock(ui, "drive", 10);
		await setBlock(ui, "shields", 5);
		await setBlock(ui, "cargo", 5);
		// empty mass = 10 + 5 + 5 = 20.
		expect(ui.getByTestId("calculator-out-emptyMass")).toHaveTextContent("20");
	});

	test("locking attack back-solves the weapons block", async () => {
		const ui = mount();
		await setBlock(ui, "drive", 10);
		await setBlock(ui, "armament", 2);
		await setBlock(ui, "weapons", 5);
		await setBlock(ui, "shields", 5);
		await setBlock(ui, "cargo", 5);
		await fireEvent.click(ui.getByTestId("calculator-lock-attack"));
		await fireEvent.input(ui.getByTestId("calculator-locked-attack"), {
			target: { value: "30" },
		});
		// weapons = 30 / weaponsTech(1.5) = 20, shown read-only.
		const weapons = ui.getByTestId("calculator-block-weapons");
		expect(weapons).toHaveValue(20);
		expect(weapons).toHaveAttribute("readonly");
	});

	test("flags an unreachable speed target as infeasible", async () => {
		const ui = mount();
		await setBlock(ui, "drive", 10);
		await setBlock(ui, "shields", 5);
		await setBlock(ui, "cargo", 5);
		await fireEvent.click(ui.getByTestId("calculator-lock-speedEmpty"));
		// ceiling is 20 * driveTech(1.2) = 24; 100 is unreachable.
		await fireEvent.input(ui.getByTestId("calculator-locked-speedEmpty"), {
			target: { value: "100" },
		});
		const locked = ui.getByTestId("calculator-locked-speedEmpty");
		expect(locked).toHaveAttribute("title", expect.stringMatching(/cannot be reached/i));
	});

	test("create adds a ship-class command once the name is valid", async () => {
		const ui = mount();
		await setBlock(ui, "drive", 10);
		await setBlock(ui, "shields", 5);
		await setBlock(ui, "cargo", 5);
		const create = ui.getByTestId("calculator-create");
		expect(create).toBeDisabled();
		await fireEvent.input(ui.getByTestId("calculator-name"), {
			target: { value: "Cruiser" },
		});
		expect(create).not.toBeDisabled();
		await fireEvent.click(create);
		expect(draft.commands).toHaveLength(1);
		expect(draft.commands[0]).toMatchObject({
			kind: "createShipClass",
			name: "Cruiser",
			drive: 10,
			shields: 5,
			cargo: 5,
		});
	});

	test("planet area prompts for a selection when none is active", () => {
		const ui = mount();
		expect(ui.getByTestId("calculator-planet-none")).toBeInTheDocument();
	});

	test("planet area shows build stats for a selected own planet", async () => {
		const selection = new SelectionStore();
		selection.selectPlanet(17);
		const ui = mount({
			report: makeReport({ planets: [LOCAL_PLANET] }),
			selection,
		});
		await setBlock(ui, "drive", 10);
		await setBlock(ui, "shields", 5);
		await setBlock(ui, "cargo", 5);
		expect(ui.getByTestId("calculator-planet-name")).toHaveTextContent("Castle");
		expect(
			ui.getByTestId("calculator-ships-per-turn"),
		).not.toHaveTextContent("—");
	});
});